Westlake Corporation
A vertically integrated maker of building products and chemicals, Westlake makes the siding, trim, roofing, windows, and PVC pipe found on homes, plus the ethylene, polyethylene, and epoxy resins used in packaging, autos, and construction. Founded in 1986 by the Chao family, it took its name from its first plant in Lake Charles, Louisiana, and grew through big acquisitions like Axiall and Boral's North American building products. It was renamed from Westlake Chemical to Westlake Corporation in 2022 to reflect that broader portfolio.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.